Cover for separator frames



NOV 7, 1950 H. o. LINDGREN 2,529,221

COVER FOR SEPARATGR FRAMES Filed June 19. 1945 Patented Nov. 7, 1950COVER FOR SEPARATOR FRAMES Hans Olof Lindgren, Smedslatten, Sweden, as-

signor to Aktiebolaget Separator, Stockholm, Sweden, a corporation ofSweden Application June 19, 1945, Serial No. 600,381 In Sweden July 7,1944 Cl. 23S- 21) 6 Claims.

The bowl of centrifugal separators is usually enclosed in a chamberarranged in the frame of the machine, this chamber being closed by acover, which is also used as a receiving vessel for separated materialand for this purpose provided with suitable receiving chambers.Heretofore, the receiving chambers were constructed either with abottom, i. e, downwardly closed, or without a bottom, i. e. downwardlyopen. In the latter case, in their closed position, they were continuedand shut by channels arranged in the frame. The cover had then to beprovided with tightening surfaces, and usually also packings, contactingwith the frame, so as to prevent communication between the receivingchambers. With constructions of this type there is, however, always arisk of leaking owing to untight packings and the like. Theinconvenience ofvthis 'is apparentl when taking into account` that, forinstance in purifying oils by removing water therefrom, the separatedliquids may become remixed if there is a leakage. The inconvenience isonly enhanced by the fact that it is impossible to know to what extentleaking has really taken place. closed receiving chambers theseinconveniences are avoided, but in that case there are difficulties withthe cleaning of the chambers which, in addition, cannot be madesufficiently deep.

By the present invention, which relates to a cover for separator framesdeveloped to a receiving vessel, all the inconveniences referred to areavoided by providing the cover with an upper and/ or outer receivingchamber, having a bottom, for separated lighter material and a lowerand/or vinner downwardly open receiving chamber for separated heaviermaterial, which latter chamber, when the cover is placed on the frame,is completed and closed downwardly by the frame, but becomes accessibleto inspection, cleaning, etc. when it is lifted off or tilted up, thetightening surface or surfaces of the cover with the frame being sovpositioned that, when the cover is lifted -off or tilted up, theseparator bowl becomes free and can readily be lifted out of the frame.It is true that the upper and/or outer receiving chamber does notthereby become accessible for cleaning at the same time as the lowerand/or inner receiving chamber, but it will be understood that the mostimportant is that the latter receiving chamber, which generally receivesthe impure liquid component, first and foremost becomes accessible forcleaning, and that uncontrollable leaking of the liquid is prevented,particularly leakage of the impure component into the puried component.

It is true that with the downwardly The cover should thereby be soconstructed that the lower and/or inner receiving chamber is limited bytwo co-axial conical walls, the one of which preferably' beingelastically connected to the other, and further so that the upper partof the upper and/or outer receiving chamber is closed by a removablepart. The lower and/or inner conical wall should bevprovided with asurface making a tight Yjoint with the frame, and the bottom of theupper and/or outer receiving chamber should also be constructed with asurface making a tight' joint with theframe. 1f, as is often the case,the cover is tiltablev on hinges, it is desirable to locate thetightening surface of the lower and/or inner conical wall in anotherplane, preferably a higher plane, than the tightening surface inthevbottom of the upper and/or outer receiving chamber.

The accompanying drawing shows by way of exam-ple one embodiment of theinvention. The separator' frame F has a wall I defining a chamber Ia'lfor receiving the centrifugal bowl 2, the top of the frame being closedby a movable cover 3. 'At its upper portion the frame extends out-Wardly from the wall I and has a wall Ilo forming therewith an upwardlyopening channel 'I which preferably extends completely around the bowlreceiving chamber Ia. Belowv the' topl .of the frame F, the latter isprovided with an outlet IEL leading from the channel 'I for dischargingone of the separated constituents, in this instance the heavierconstituent. In the cover 3 there are two. receiving chambers, one upperand/or outer 4, provided with a bottom 5, and one lower and/or inner 6,open downwardly, `and continuedand closed by the channel 1 inv theframe. The chamber 6 for the separated heavier constituent is limited bytwo co-axial conically shaped walls 8, yEl, the latter of which isconnected to the former by an elastic device I II. The lower and/orinner conical wall 9 is provided with a tightening surface I Icontacting with the frame, and the bottom 5 is likewise provided with asurface I2 making a tight joint with the frame, the latter surface beingprovided with a packing. This tightening surface may of course also beso constructed as to make it possible to dispense with the packing, andon the other hand it would also be possible to provide the tighteningsurface I I with a packing. The cover 3 is tiltable around a shaft I3and for this purpose journaled on the shaft by means of an arm I4 whichextends from a detachable part I5, by screws fixed to and closing theupper and/or outer receiving chamber of the cover.

ing the detachable part and correspondingly fixing the hinge member l1to the frame. The receiving chamber 4 communicates by a tube I6, formingpart of the cover, with an outlet I8 which forms part of the frame F andis disposed outwardly of channel 1. A tight joint is preferably obtainedbetween the tube I6 and the pipe line by means of a packing, thethickness of which may be varied in any suitable manner, as by usingrings of different thickness, etc., so that a satisfactory tight jointis obtained at the same time as at other tightening surfaces.

The above arrangement has only been described by Way of example and itsdetails may therefore be varied in oneor more respects. Additionalreceiving vessels may e. g. be arranged on top of those illustrated,andespecially a receiving vessel for surplus liquid may be provided. v

I claim: v

1. A centrifugal separator comprising a frame having a wall at leastpartly defining a bowlreceiving chamber, the frame also having a walldisposed outwardly from said first wall and forming therewith anupwardly opening channel surrounding said chamber, the frame also havingbelow its top an outlet from said channel for a separated heavierconstituent, and a movable cover for the frame having an annularreceiving chamber for a separated lighter constituent, the cover alsohaving a lsecond annularreceiving chamber for said heavierconstituent'and opening downwardly into said channel in the frame, saiddownward opening extending continuously around said first wall of theframe, the cover including an annular inner wall normally resting uponsaid rst wall of -the rframe rand forming an upward extension of theinner wallof said channel. c

2. A centrifugal separator according to claim 1, -in which` said coverincludes a top releasably connected to the underlyingpart of the coverand partly dening said receiving chamber for the separated lighterliquid, and a pivotal connection between said top and the frame and onwhich the cover is adapted to swing on a horizontal axis.

3. A centrifugal separator according to claim 1, in which the bottom ofsaid lighter constituent receiving chamber is closed and Yhas a ysurfacemaking a tight joint with said outer frame wall of said channel aroundthe periphery of the channel.

4. A centrifugal separator comprising a frame having a wall at leastpartly defining a bowlreceiving chamber, the frame also having a walldisposed outwardly from said rst wall and forming therewith an upwardlyopening channel extending along the periphery of the chamber,

the frame having below its top an outlet from` said channel for aseparated heavier constituent and valso having below its top an outletfor a separated lighter constituent, saidlast outlet being separatedfrom the channel by said outer wall of the frame, a movable cover forthe frame having an annular receiving chamber for said separated lighterconstituent and also having a second annular receiving chamber for saidseparated heavier constituent, said last receiving chamber openingdownwardly into said channel in the frame and having an inner annularwall resting upon said rst wall of the frame, -said lighter constituentreceiving chamber having a bottomresting upon said outer wall of theframe and closed except for a discharge passage leading downward intosaid frame outlet for the separated lighter constituent, and a packing`extending along the outer periphery of the channel between said bottomand said outer wall of the frame, said packing having its outer edgebordering upon atmosphere, whereby leakage., of one vseparated.constituent into the other is prevented.

5.4 A centrifugal separator according to claim 4, comprising also apacking surrounding said rpassage and disposed between the cover and theframe, said packings being separated yby atmosphere. I 1- -6. Acentrifugal separator according to claim 4, comprising also a packin'gbetween said first wall of the frame and said innerv annular wall ofvthe heavier constituent receiving cha-mbensaid lastv packing having itsinner edge bordering upon said bowl-receiving chamber. y i* HANS OLOFLINDGrREN.A

REFERENCES CITED rllhe following references are of record in the le ofthis patent:

UNITED STATES PATENTS Date Great Britain Oct.` 1,1937

